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发明名称	Blueprint
摘要
申请公布号	US2346872(A)	申请公布日期	1944.04.18
申请号	US19400335554	申请日期	1940.05.16
申请人	KEUFFEL & ESSER COMPANY	发明人	HOLDEN JOHN
分类号	G03C1/64	主分类号	G03C1/64
代理机构		代理人
主权项
地址

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